package me.zfz.base.init.config;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Properties;

import me.zfz.base.constant.IConstant;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import me.zfz.base.init.Init;

import com.mixsmart.utils.LoggerUtils;
import com.mixsmart.utils.StringUtils;

/**
 * 初始化系统配置文件
 *
 * @author author
 */
public class MimeTypeConfig implements Init {

    private static MimeTypeConfig instance;

    private static final String MIME_CONFIG_FILE = "/mime-type.properties";

    private static final Logger logger = LoggerFactory.getLogger(MimeTypeConfig.class);

    private long lastModifyTime = 0;

    private Properties prop = null;

    private MimeTypeConfig() {
        init();
    }

    /**
     * 重新加载配置文件
     */
    private void reloadConfig() {
        String devModel = InitSysConfig.getInstance().getValue("project.devModel");
        if (StringUtils.isNotEmpty(devModel) && IConstant.PROJECT_DEV_MODEL.equals(devModel)) {
            URL path = this.getClass().getResource(MIME_CONFIG_FILE);
            File file = new File(path.getFile());
            path = null;
            if (file.exists()) {
                //判断文件是否被修改过，如果文件已修改，则重新初始化文件
                if (file.lastModified() > lastModifyTime) {
                    reInit();
                }
            }
            file = null;
        }
    }

    /**
     * 获取实例
     *
     * @return InitSysConfig
     */
    public synchronized static MimeTypeConfig getInstance() {
        if (null == instance) {
            instance = new MimeTypeConfig();
        }
        instance.reloadConfig();
        return instance;
    }


    protected void init() {
        LoggerUtils.info(logger, "初始化mime配置文件-------");
        InputStream in = null;
        try {
            in = getClass().getResourceAsStream(MIME_CONFIG_FILE);
            if (null != in) {
                prop = new Properties();
                prop.load(in);
            }
            URL path = this.getClass().getResource(MIME_CONFIG_FILE);
            File file = new File(path.getFile());
            lastModifyTime = file.lastModified();
            path = null;
            file = null;
            LoggerUtils.info(logger, "初始化mime配置文件[结束]-------");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (null != in) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }


    /**
     * 获取值
     *
     * @param key
     * @return String
     */
    public String getValue(String key) {
        String value = null;
        if (null != prop && StringUtils.isNotEmpty(key)) {
            try {
                value = StringUtils.handleNull(prop.get(key));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return value;
    }

    /**
     * 获取多个值
     *
     * @param keys 多个关键字直接用 {@link IConstant#MULTI_VALUE_SPLIT} 分隔
     * @return 返回多个值，多个值直接用  {@link IConstant#MULTI_VALUE_SPLIT} 分隔
     */
    public String getValues(String keys) {
        StringBuilder valueBuild = null;
        if (StringUtils.isEmpty(keys)) {
            return null;
        }
        valueBuild = new StringBuilder();
        String[] keyArray = keys.split(IConstant.MULTI_VALUE_SPLIT);
        for (int i = 0; i < keyArray.length; i++) {
            valueBuild.append(getValue(keyArray[i]) + IConstant.MULTI_VALUE_SPLIT);
        }
        valueBuild.delete(valueBuild.length() - 1, valueBuild.length());
        return valueBuild.toString();
    }

    @Override
    public void reInit() {
        init();
    }

}
